r/DeepSeek • • 16m ago

News DeepSeek V4.1-Flash-1017 Released: Better Performance, Faster Coding, and Public Search & Fetch APIs

• Upvotes

DeepSeek V4.1 Flash has been updated to V4.1-Flash-1017. The new model is now live across our official website, mobile app, and API.

Better performance at lower cost

Compared with the previous version of DeepSeek V4.1 Flash, the new model delivers substantial improvements across a wide range of benchmarks.

Alongside these performance gains, we have reduced task completion times and output lengths, helping users complete tasks faster and at lower cost. The model establishes a new performance–cost Pareto frontier across multiple harnesses.

This release includes targeted optimizations for DeepSeek Harness, Tencent CodeBuddy, and WorkBuddy. For the best experience with the updated model, please upgrade to DeepSeek Harness 0.2.1-rc.1 or later.

DeepSeek V4.1-Flash-1017 performance and cost on DeepSWE, evaluated using the mini-swe-v2 framework.

Our Search & Fetch APIs are now public

Our in-house DeepSeek search engine has long powered search across the DeepSeek website and API, reliably handling hundreds of millions of search requests from around the world every day.

DeepSeek Search is an AI-native, general-purpose search engine that indexes hundreds of billions of web pages. It supports multilingual search and returns highly relevant, authoritative, and up-to-date results in real time.

We apply rigorous detection and filtering to combat SEO spam, generative engine optimization (GEO) manipulation, and low-quality AI-generated content, helping users and LLMs access authoritative, trustworthy information.

With this release, the DeepSeek API adds public access to Search and Fetch. Both endpoints are priced at CNY 5 per 1,000 calls. For implementation details, please refer to API Guide → Web Search & Fetch in the official API documentation.

Billing notice: When using the DeepSeek API through DeepSeek Harness, Claude Code, or Codex, server-side tool calls already access the Search and Fetch endpoints. These calls are currently unbilled. Usage-based billing for these calls begins on November 1, 2026, at 00:00 Beijing time (UTC+8), equivalent to October 31, 2026, at 16:00 UTC.

Model weights

Download DeepSeek-V4.1-Flash-1017 from:


r/DeepSeek • • 6m ago

Resources Upcoming Deepseek plugin - second Brian

• Upvotes

r/DeepSeek • • 12m ago

Discussion Is DeepSeek good for RP

• Upvotes

i used grok and Gemini before now both not good in free version

How about memory of DeepSeek


r/DeepSeek • • 21m ago

News PSA: DeepSeek-V4.1-Flash-1017 Update (official)

• Upvotes

Date: 2026-10-17

Opening up the in-house search API
DeepSeek's web and API search capabilities are powered by our in-house DeepSeek search engine, which reliably handles hundreds of millions of search requests from around the world every day. DeepSeek Search is an AI-native general-purpose search engine that indexes hundreds of billions of web pages, supports multilingual search, and returns highly relevant, authoritative, and timely results in real time. It filters SEO spam, GEO manipulation, and low-quality AIGC through strict detection mechanisms, ensuring authoritative and trustworthy information for users and LLMs. For usage details, see the Search & Fetch guide.

- DeepSeek-V4.1-Flash-1017 Update
- DeepSeek V4.1 Flash has been upgraded to DeepSeek-V4.1-Flash-1017.

The official web and APP models have also been updated to the new version. The API calling method and pricing remain unchanged — simply use deepseek-flash to access the latest model.
Performance–cost Pareto improvement
Compared with the previous DeepSeek V4.1, the new model delivers substantial improvements across benchmarks:

HLE (w/o tools): 42.6 (44.0*)
Terminal-Bench 4.0: 42.3
DeepSWE v1.1: 77.0
ProgramBench: 29.1
NL2Repo-Bench: 68.2
Automation-Bench v1.0.6: 60.5
Agents' Last Exam: 35.4
Apex Bench v1.1: 72.1
Chartography (w/tools): 83.0
BabyVision (w/tools): 92.5
ZeroBench-main (w/tools): 51.0

* Tested only on the pure-text subset of the HLE benchmark set. Terminal-Bench 4.0 was tested with the Claude Code framework, and DeepSWE with the Mini-SWE-V2 framework. ZeroBench-main was evaluated with Pass@5.

While improving performance, we also reduced the model's task runtime and output length, enabling users to complete tasks at lower cost and higher speed and achieving a new performance–cost Pareto optimum across multiple harnesses. We specifically optimized for DeepSeek Harness, Tencent CodeBuddy, WorkBuddy, and other platforms. Please upgrade to DeepSeek Harness 0.2.1-rc.1 or later for the best experience with the new model.

Source:
https://api-docs.deepseek.com/updates/


r/DeepSeek • • 1h ago

News DeepSeek V4.1 Flash 1017 is silently rolling out? 😲

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• Upvotes

"... DeepSeek v4.1-flash-1017 just got spotted in DeepSeek's own API for a few minutes before vanishing. New checkpoint, changed fingerprint. The 1017 suffix matches their dated snapshot pattern."


r/DeepSeek • • 2h ago

Discussion is this normal spend for 24hrs?

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0 Upvotes

r/DeepSeek • • 2h ago

Funny Hey DeepSeek, do you guys have any serious plans for your TTS? (Please drop an API)

0 Upvotes

Ok, so I recently found the new TTS feature on the DeepSeek web client. Real talk... it is crazy good.

I want to build stuff with this, but it's inconvenient that I can only interact with it via the web right now.

Just some feedback (at least in my testing):

- Tested it with Vietnamese. If the text is "1. Tiêu đề 1", it literally reads "one, Tiêu đề one". Mixing English numbers with Vietnamese words sounds funny as hell.

- Another thing: it completely skips tables (doesn't read them) but decides to read links out loud.

Hope you guys take notes on this. Happy to contribute more once you open it up!

Btw, Stella's voice is totally my bias fr.


r/DeepSeek • • 3h ago

News DeepSeek users report a possible V4.1-Flash-1017 refresh across its API

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65 Upvotes

r/DeepSeek • • 4h ago

Discussion Byebye DS... See u next model release

0 Upvotes

Today, my ds platform API credit hit 0, and im not refilling it, ds4.1 flash has become unusable for technical tasks, as main or sub agent.

I've claude sub, and local gpus, but since 4.0 routed much of my sub tasks to a DS agent, every week it get worst, you need to constantly rewrite more rigid prompts so it does not start testing every single thing in the env, creating new scripts to modify a line in a file(many times wrong) and starting new epic resarch lines when asked to do basic stuff.

As its served today its not usable, so sadly waiting for next model release and hoping for some iq back.

Qwen 3.8 and opus 5.5 are in a totally different league in instruction following, coding and day to day usage, wired that a 27b model on my 24gb 5 year old cards beat it by a wide margin.

Hows ur experience lately?


r/DeepSeek • • 5h ago

Discussion I created a 2D, SpaceEngine-inspired procedual space sim

0 Upvotes

Having zero coding skills and not working with this field, I've managed to code a Space Sim with DeepSeek. It's a 100% procedural, browser depedent game with zero dependencies. It features an entire universe generated from a single 300KB HTML file. It's open-source (MIT). Still being developed.

GitHub Repository

Singularvs, as I've called, is a contemplative space simulator inspired by SpaceEngine and the 1984 classic Elite. It features a ~1 Gpc universe with procedural galaxies, hierarchical star systems (up to 8 stars, brown dwarfs, black holes), almost scientifically classified planets, internal tectonic simulations, dynamic skies, and even procedural music.

I didn't write a single line of code by hand. I used natural language to describe what I wanted, the AI wrote, I ran, tested, debugged, answered what happened and so on. By iterating back and forth for 3 days, this is the result. Also, only English and Portuguese as of now. I know both languages and reviewed them too.

  • Vanilla JavaScript
  • Zero external libraries, zero assets
  • Deterministic PRNG
  • Xinput controller support (I've only tested my Gamesir Controller)

It's fully open-source and moddable. I do not guarantee it has zero glitches or flaws. But I hope it fits here.


r/DeepSeek • • 6h ago

Discussion Nova atualização?

3 Upvotes

Depois da queda de ontem eu notei que as respostas ficaram um pouquinho melhores, embora ele se perca demais em detalhes e ainda está com inconsistências. Mas vi hoje que tivemos uma nova atualização, podem me dizer o que estão achando? Se alguém já notou algum avanço ou melhora na memória, escrita e desempenho. Boa noite!


r/DeepSeek • • 7h ago

Question&Help What DeepSeek still don't have ARC AGI 3 score?

1 Upvotes

Does that mean DeepSeek is weak or not so smart in ARC AGI 3? I really hope it will have it as soon as possible, intelligence is FAR more valuable than knowledge


r/DeepSeek • • 8h ago

Question&Help API roleplay

0 Upvotes

Sorry in advance for my English.

So, I paid for API to roleplay with deepseek as I used to do with website until recent model was launched.

I chose v 4 pro, set temperature to 1,35, filled all necessary info, and I just don't see any difference. Responses are dry, short, lack details. Where are my long beautiful engaging texts?

What else should I do or pay attention to? Any advice, please, from someone who is lucky to enjoy the roleplay.


r/DeepSeek • • 9h ago

Funny Artificial Analysis must be some kind of CIA front ... this chart is so hilariously backwards, it's insane

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0 Upvotes

r/DeepSeek • • 9h ago

Resources DeepSeek V4.1 went from 5/9 to 9/9 successful runs on my coding benchmark when paired with a worker model

22 Upvotes

I'm the author of Distill, an open-source coding agent harness (Apache-2.0): https://github.com/samuelfaj/distill

Use case: running DeepSeek as a coding agent without it timing out or burning tokens on every small step.

What I tested: DeepSeek V4.1 Flash at max effort in native Codex (through OpenRouter) against Distill with DeepSeek as the main model and free models from the OpenRouter free router as the worker. Three frozen coding tasks, three runs each, same 300s deadline.

Results:

  • Successful runs: 5/9 native vs 9/9 Distill
  • Time: 1974s vs 490s
  • Cost: at least $0.098 vs $0.012

Chart with the other model pairs: /img/q12ttj8lkwvh1.png

Caveats: native Codex warned about missing model metadata in all nine DeepSeek runs and fell back to default metadata, so this wasn't an officially supported Codex profile. Three native calls timed out without usage receipts, so the native cost is only a lower bound. It's a small benchmark.

BENCHMARKS.md in the repo has the full numbers and the commands to rerun it. Has anyone else run DeepSeek in a planner/worker setup?


r/DeepSeek • • 10h ago

Discussion DeepSeek + Pi

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2 Upvotes

Insane cache hit.


r/DeepSeek • • 12h ago

Funny DeepSeek and ChatGPT deserve an award

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0 Upvotes

r/DeepSeek • • 13h ago

Question&Help The state of the chatbot

7 Upvotes

Is the free chat function really that bad as people here make it out to be?

I had some problems but most of the time it gives a solid result.

Of course I will need to make some more important work and I was thinking of paying for Claude.

Is it better to use this DeepSeek free chat or is it bad enough to just go straight to a paid subscription?


r/DeepSeek • • 14h ago

Other We will be left without an affordable LLM option to work with.

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0 Upvotes

r/DeepSeek • • 15h ago

Discussion Deepseek v4.1 Pro? (Maybe)

9 Upvotes

DeepSeek feels kinda different lately. I’ve noticed that its responses are noticeably slower when I generate random micro-RP scenes and ask it to expand them into longer ones. The slowdown is pretty noticeable, and it makes me wonder if something’s changed behind the scenes. Could this be a sign that DeepSeek V4.1 Pro is on the way? 👀


r/DeepSeek • • 16h ago

Discussion What are your thoughts about the deepseek search & fetch api

1 Upvotes

hey guys, just want to know your thoughts about the deepseek search & fetch api. i've been finding ai search engine like exa, tavily and etc. deepseek search api is way cheaper than those existing ai search engine. i haven't tried the api yet. just want to know how was your experince with it (if you have any).

reference:

https://api-docs.deepseek.com/guides/search


r/DeepSeek • • 17h ago

Discussion DeepSeek’s IQ is high. Its sycophancy will ruin your work.

91 Upvotes

I've been running an API gateway for DeepSeek for a while now, and I see hundreds of developers' usage patterns every day. One thing keeps coming up: DeepSeek by default is a people-pleaser.

If you say "I think X is the best approach," it'll say "Great point! X is indeed a solid choice." That's fine for brainstorming, but when you're debugging or planning, that behavior is dangerous. It won't tell you you're wrong. It won't poke holes in your plan.

So I started testing ways to break it out of that mode. Here's what actually worked:

1. "Don't flatter me. If my idea is flawed, say so directly. I need honest feedback, not validation."

After this, the tone shifts. It points out edge cases, questions assumptions, pushes back.

2. "Argue against my proposal. What are the three strongest reasons this could fail?"

Forces it into devil's advocate mode. Use before important decisions.

3. "You are a senior code reviewer. Find bugs and design flaws. Be harsh."

Role-setting changes expectations. It stops trying to be nice, starts being useful.

4. "On a scale of 1-10, how confident are you? If below 7, tell me what you're uncertain about."

Flags its own weak spots instead of confidently making things up.

5. The one I haven't seen elsewhere: ask it to argue with itself.

I ask DeepSeek to generate two responses: one supporting my idea, one attacking it. Then I ask it to judge which argument is stronger. The attacking response often surfaces issues the supporting one completely ignores.

These aren't magic prompts. They're just ways to override the default "agreeable assistant" behavior.

I'll be sharing one small tip like this every day — practical stuff to get real work done with AI. If you've got your own tricks, drop them in the comments.


r/DeepSeek • • 17h ago

Discussion Anyone still using DeepSeek 3.2?

0 Upvotes

Now, why does the response look like it's from DeepSeek V4? Or is it actually a downgrade from DeepSeek 3.2?


r/DeepSeek • • 18h ago

Discussion I tried to use Claude code but with Deepseek API backend, then asked it about Tiannamen square 1989, and it answered normally. Why ???

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0 Upvotes

I tried to use Claude code but with Deepseek API backend, then asked it about Tiannamen square 1989, and it answered normally to my surprise. I thought the model is censored ???


r/DeepSeek • • 19h ago

Question&Help Does DeepSeek has watermark like claude?

12 Upvotes

As claude and gemini has instilled watermarks in their reponses, does DS also has a watermark like that?

if not, do you think it will be implemented tn future?